Stunted FEMs after 4 weeks. Any thoughts?

After 4 weeks in those small pots, they definitely need transplanting, the soil will be by now, exhausted and the roots all out of room. If you can transplant them without the cardboard pots, this would be better, they take a very long time to break down and give the roots freedom. Don't worry about temps or humidity, it has no huge effect, not to slowing growth greatly anyway, unless it is extremely high or extremely low, besides, plants have lived for millions of years without everything being exact or treated like princesses. Cultivation should be fun and not a chore or test to have everything AAA+++. Does it really matter if you get 74 grams and not 81? So, transplant into fresh soil and into pots with lots of room for root growth and I am sure your babies will take off. Hope this helps,........... Organoman.

Hey there King, so plant growth rate is determined by the plant's metabolism which is regulated by VPD, which is the relationship between temperature and humidity. So right now you're at 27C/55% and you should be around 24C/65% . it doesnt seem like much but sometimes the genetics are a bit more sensitive then normal. You know, sometimes at this stage of the plant, most of the growing action is happening under ground so that's also maybe why it looks like nothing is happening. Hope this helps growmie ! 🚀